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05-21-2008, 08:07 AM
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#1 |
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Registered User
Join Date: Jun 2007
Location: Little Elm, Tx
Posts: 14
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Rear Differential Swap and Gearing Question??
I have a 67 GMC that Rod helped me decode the VIN as a V6 and standard trans. It currently has a 350 with a 350 Turbo.
The gearing is wrong for the trans and am debating on getting it regeared or swap the rearend from something comparable. As far as I can tell it's the stock 12 bolt with leaf springs. Any comments or suggestions welcome. 
Last edited by jsburton69; 05-21-2008 at 08:15 AM. |
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05-21-2008, 09:06 AM
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#2 |
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Registered User
Join Date: Apr 2004
Location: Las Vegas, NV
Posts: 2,188
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Re: Rear Differential Swap and Gearing Question??
I could give you a shorter version, but this website should explain things pretty well; how to determine your gear ratio.
http://www.jedi.com/obiwan/jeep/misc/gearratio.html
__________________
RIP EastSideLowLife '72 C20 SWB convert. 5 lug, LS1/4l60e Last edited by chevy72blu; 05-21-2008 at 09:06 AM. |
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05-21-2008, 10:31 PM
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#3 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,690
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Re: Rear Differential Swap and Gearing Question??
you gotta know what you heve before you know where you need to go.
A lot of people will say a 3.73 is fine (which you probably have) however, if you have a 3.07 in there, and it's still too low for you, then you may lose a lot of money to get no where. |
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05-23-2008, 03:58 AM
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#4 |
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Registered User
Join Date: Feb 2007
Location: west coast
Posts: 3,396
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Re: Rear Differential Swap and Gearing Question??
Hard to tell from photo, but the standard axle on 67 GMC should be a dana 44. The came in all sorts of ratios from 3.07 to 3.54 to 4.11.
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